{"schemaVersion":3,"id":"USN-8389-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux, linux-aws, linux-aws-fips, linux-azure, linux-azure-5.4, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp vulnerabilities\n\nIt was discovered that the Linux kernel did not properly handle shared page\nfragments during socket buffer operations, collectively known as Dirty\nFrag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the\nRxRPC networking subsystem when processing paged fragments. A local\nattacker could use this to escalate privileges, or possibly escape a\ncontainer. (CVE-2026-43284, CVE-2026-43500)\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - RDS protocol;\n(CVE-2026-43494)","dates":{"published":"2026-06-04T21:09:56.000Z","modified":"2026-07-06T20:30:23.798Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"linux","name":"linux","label":"linux","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux","purlType":"deb","versions":[{"text":"< 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5.4.0-1164.170+fips1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-bluefield","name":"linux-bluefield","label":"linux-bluefield","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-bluefield","purlType":"deb","versions":[{"text":"< 5.4.0-1119.126","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1119.126","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-fips","name":"linux-fips","label":"linux-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-fips","purlType":"deb","versions":[{"text":"< 5.4.0-1134.144","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1134.144","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp","name":"linux-gcp","label":"linux-gcp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp","purlType":"deb","versions":[{"text":"< 5.4.0-1163.172","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1163.172","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-5.4","name":"linux-gcp-5.4","label":"linux-gcp-5.4","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-5.4","purlType":"deb","versions":[{"text":"< 5.4.0-1163.172~18.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1163.172~18.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-fips","name":"linux-gcp-fips","label":"linux-gcp-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-fips","purlType":"deb","versions":[{"text":"< 5.4.0-1163.172+fips1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1163.172+fips1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-iot","name":"linux-iot","label":"linux-iot","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-iot","purlType":"deb","versions":[{"text":"< 5.4.0-1064.67","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1064.67","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-kvm","name":"linux-kvm","label":"linux-kvm","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-kvm","purlType":"deb","versions":[{"text":"< 5.4.0-1147.156","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1147.156","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-oracle","name":"linux-oracle","label":"linux-oracle","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-oracle","purlType":"deb","versions":[{"text":"< 5.4.0-1158.168","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1158.168","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-oracle-5.4","name":"linux-oracle-5.4","label":"linux-oracle-5.4","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-oracle-5.4","purlType":"deb","versions":[{"text":"< 5.4.0-1158.168~18.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1158.168~18.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-xilinx-zynqmp","name":"linux-xilinx-zynqmp","label":"linux-xilinx-zynqmp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-xilinx-zynqmp","purlType":"deb","versions":[{"text":"< 5.4.0-1078.82","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.4.0-1078.82","eol":null,"hubHref":null}],"affectedCount":16,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8389-1","label":"ubuntu.com/security/notices/USN-8389-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-43284","label":"ubuntu.com/security/CVE-2026-43284","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43494","label":"ubuntu.com/security/CVE-2026-43494","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43500","label":"ubuntu.com/security/CVE-2026-43500","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-43284","CVE-2026-43494","CVE-2026-43500"]},"timeline":[{"kind":"published","date":"2026-06-04T21:09:56.000Z","label":"Published","detail":"Vulnerability first 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